Tandem stroller



FIG. 1 is a left rear perspective view of a tandem stroller, showing our new design;

FIG. 2 is a right side elevational view thereof, with one top cover portion opened;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view of the configuration shown in FIG. 2; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a tandem stroller, as shown, and described. 